Manganese slag molten liquid granulation device and method

Abstract

The application discloses a manganese slag molten liquid granulating device and method, and relates to the field of manganese slag granulation. The granulating device comprises a granulating bin and a granulator. The granulator comprises a rotating drum, a central shaft, a supporting cylinder and a driving part. The supporting cylinder is vertically fixed in the granulating bin. The central shaft is rotatably arranged in the supporting cylinder. The top end of the central shaft extends out of the supporting cylinder and is fixedly connected with the bottom end of the rotating drum. The bottom end of the central shaft extends out of the granulating bin and is connected with the output end of the driving part. A plurality of spray pipes are arranged around the bottom sidewall of the rotating drum. The plurality of spray pipes are all connected with the inside of the rotating drum. The intermittent spraying control parts are arranged on the plurality of spray pipes. The manganese slag molten liquid to be granulated is introduced into the rotating drum. Under the action of centrifugal force, the manganese slag molten liquid enters the spray pipes. The manganese slag molten liquid in the spray pipes is subjected to mechanical crushing through the rapid opening and closing of the intermittent spraying control parts. The manganese slag molten liquid is intermittently sprayed into the granulating bin for granulation. The particle size of the slag particles obtained through granulation can be effectively controlled. The slag particles are uniform. The granulation effect of the molten slag is effectively enhanced.

Description

Technical Field

[0001] This invention relates to the field of energy conservation and environmental protection technology, specifically to a manganese slag granulation device and method. Background Technology

[0002] Ferromanganese alloys are an indispensable additive in steel manufacturing, primarily composed of manganese and iron. When producing different grades of ferromanganese alloys using traditional processes, the final slag, after being produced by ladle smelting, is typically treated using either water quenching or dry slag pit cooling. Existing water quenching processes suffer from severe environmental pollution and energy waste, resulting in the waste of approximately 10 million tons of standard coal equivalent in heat and the emission of 400,000 tons of harmful gases such as H2S and SO2 annually. Dry slag pit cooling also generates large amounts of water vapor during cooling, releasing significant amounts of H2S and SO2 gases, which corrode buildings, damage equipment, and deteriorate the working environment. These methods no longer meet current requirements for energy conservation, emission reduction, and clean production. Dry centrifugal granulation, due to its advantages such as recovering slag waste heat, ensuring material quality, simple and compact equipment, and low system energy consumption, is considered the most promising method for slag waste heat recovery and is widely favored.

[0003] In the dry centrifugal granulation process, molten slag drips onto the surface of a high-speed rotating granulator and is ejected under the action of centrifugal force and friction. Under the action of surface tension, it forms small droplets. These tiny droplets undergo forced convection heat transfer with the heat transfer medium in the space and radiative heat transfer with the surrounding environment, causing the temperature of the droplets to drop and transform into solid particles. However, when granulating high-viscosity manganese slag melt, its centrifugal granulation effect is severely hampered by its high viscosity and surface tension. The droplets formed after granulation are large and uneven in size. The large slag particles cool slowly in the granulation chamber space, allowing sufficient time for crystallization, thereby reducing their glass conversion rate and affecting the granulation effect. Summary of the Invention

[0004] The main objective of this invention is to overcome the deficiencies of the prior art and provide a manganese slag melt granulation device and method.

[0005] To achieve the above objectives, the present invention proposes a manganese slag granulation device, comprising a granulation chamber and a granulator disposed inside the granulation chamber. The top of the granulation chamber has a hot air outlet, and the top of the granulation chamber has a slag guide pipe extending through to the top of the granulator. The bottom of the granulation chamber has a slag particle outlet pipe and a cold air inlet pipe. The granulator includes a rotating drum, a central shaft, a support cylinder, and a drive component. The support cylinder is vertically fixed on the center line of the granulation chamber. The central shaft is rotatably disposed inside the support cylinder, with its top extending outside the support cylinder and fixedly connected to the bottom end of the rotating drum. The bottom end of the central shaft extends outside the granulation chamber and is connected to the output end of the drive component. A plurality of injection pipes are arranged around the bottom sidewall of the rotating drum, and each injection pipe is connected to the interior of the rotating drum. Each injection pipe is equipped with an intermittent injection control component. The intermittent injection control component includes a fixed base, a sealing plate, and an annular guide rail. The fixed base is fixed to the outer wall of the rotating cylinder. The injection pipe passes horizontally through the fixed base. The fixed base has a receiving groove. The injection pipe has a gate on its body located in the receiving groove. The sealing plate is slidably disposed in a slide formed by the two side walls of the receiving groove and the gate. The sealing plate has a blocking area and a passing area. The two ends of the sealing plate are respectively provided with an upper guide rod and a lower guide rod. The two ends of the fixed base are respectively provided with through holes for the upper guide rod and the lower guide rod to pass through. A spring is sleeved on the upper guide rod. The annular guide rail is fixed to the top of the support cylinder. The surface of the annular guide rail is provided with several arc-shaped protrusions at intervals. The bottom end of the lower guide rod is rotatably provided with a roller, which corresponds to the surface of the annular guide rail. During granulation, the molten manganese slag to be granulated enters the top of the granulator along the slag guide pipe and falls into the rotating drum. Under the action of centrifugal force, the molten manganese slag enters the injection pipe. The intermittent injection control component rotates synchronously. When the roller at the bottom of the lower guide rod rolls onto the protrusion, the lower guide rod lifts the sealing plate to open the injection pipe. After the roller leaves the position of the protrusion, the spring presses down on the sealing plate to block the injection pipe and cut off the molten manganese slag. The repeated opening and closing causes the molten manganese slag filaments in the injection pipe to be mechanically broken and disturbed before flying out. The flying slag particles undergo convective heat exchange with the cold air blown from bottom to top for rapid cooling and shaping. Some slag particles fly onto the side wall of the granulation chamber. The slag particles obtained by granulation are smaller in diameter and more uniform, effectively enhancing the granulation effect of the molten slag.

[0006] Furthermore, a nozzle is detachably provided at the end of the injection pipe away from the rotating drum. The particle size and shape of the slag particles can be further adjusted and changed through the nozzle.

[0007] Furthermore, the inner bottom surface of the rotating drum is provided with a guide cone, and several chutes are arranged around the conical surface of the guide cone. One end of each chute near the side wall of the rotating drum is connected to one end of the injection pipe. The dimensions of the chutes gradually decrease from the middle conical surface of the guide cone to the bottom of the cone. The guide cone allows the molten manganese slag to diffuse and flow evenly to the periphery. The chutes are formed by raised ribs on both sides. When the rotating drum rotates, it can agitate part of the molten manganese slag to form a vortex, which promotes the mixing of the molten manganese slag and avoids local cooling and solidification.

[0008] Furthermore, the rotating drum, from the inside out, consists of an inner liner, a heating coil, an insulation layer, and a protective shell. The heating coil is fitted onto the inner liner, and a conductive ring is provided on the top end face of the support cylinder. The terminal on the heating coil is electrically connected to the conductive ring. The heat generated by the heating coil radiates to the molten manganese slag for heating and insulation, ensuring the fluidity of the molten manganese slag inside the rotating drum, reducing its viscosity, and preventing solidification and blockage that would affect the granulation effect.

[0009] Furthermore, a central gear is fitted onto the protective shell, and several planetary gears are meshed around the central gear. Each planetary gear is rotatably mounted on a planetary carrier, which is fixedly connected to the inner wall of the granulation chamber via a fixing rod. A large gear ring is meshed around the planetary gears, and a scraper is connected to the large gear ring, abutting against the inner wall of the granulation chamber. The scraper can promptly scrape off the molten slag adhering to the inner wall of the granulation chamber, preventing slag particles from splashing and adhering to the inner wall, thus affecting the radiative heat transfer effect.

[0010] Furthermore, the scraper has a "C" shaped structure, a support ring is sleeved at the bottom of the support cylinder, and the lower end of the scraper is connected to the support ring.

[0011] Furthermore, the granulation chamber has a double-cone tank structure, and the middle tank body of the granulation chamber is provided with a jacket sleeve, which is connected to a cooling water inlet and a cooling water outlet.

[0012] Furthermore, a fluidized bed is provided at the bottom of the granulation chamber, the cold air inlet pipe is connected to the air inlet of the fluidized bed, and the slag particle outlet pipe is connected to the discharge outlet of the fluidized bed.

[0013] The present invention also proposes a method for granulation using the above-mentioned manganese slag molten liquid granulation device, comprising the following steps:

[0014] S1. Start the drive unit. The drive unit drives the rotating drum to rotate through the central shaft. At the same time, the external power supply is connected to the heating coil through the conductive ring. The external cooling air enters the fluidized bed from the cold air inlet pipe and blows upward. The external cooling water enters the jacket from the cooling water inlet and flows out of the jacket from the cooling water outlet for circulation.

[0015] S2. The molten manganese slag enters the rotating drum through the slag guide pipe, is poured onto the top of the guide cone, and flows evenly into the chute along the guide cone. Under the action of centrifugal force, part of the molten manganese slag is thrown onto the inner wall of the rotating drum, and part enters the injection pipe and is thrown outward. During the flight of the molten manganese slag filaments, it gradually splits into droplets. The droplets exchange heat with the air blown up from the fluidized bed in the granulation chamber through convection and with the side wall of the jacket through radiation, and initially solidify into slag particles of a certain size.

[0016] S3. When the molten manganese slag is thrown onto the inner wall of the rotating drum, the heat generated by the energized heating coil is radiated to the molten manganese slag for heating and heat preservation, ensuring the fluidity of the molten manganese slag inside the rotating drum.

[0017] S4. During the process of the manganese slag molten liquid being thrown out of the injection pipe, the intermittent injection control component continuously opens and closes the injection pipe at intervals to mechanically break the manganese slag molten liquid filaments in the injection pipe. When the intermittent injection control component is working, it rotates together with the rotating drum. When the lower guide rod on the intermittent injection control component rotates to the protrusion on the annular guide rail, the sealing plate is pushed up so that the passage area on the sealing plate is aligned with the cavity of the injection pipe, and the manganese slag molten liquid can be thrown out through the injection pipe. After the lower guide rod leaves the protrusion, the sealing plate descends under the action of the spring force on the upper guide rod so that the sealing area blocks the cavity of the injection pipe, realizing the intermittent opening and closing of the injection pipe.

[0018] S5. When the molten manganese slag is thrown onto the inner wall of the granulation chamber, the central gear on the protective shell drives the planetary gear to rotate. After the planetary gear is decelerated, it drives the large gear ring to reverse. The large gear ring drives the scraper to rotate and scrape off the molten slag stuck to the inner wall of the granulation chamber, so as to avoid affecting the cooling of the slag particles.

[0019] S6. Under the influence of gravity, the initially solidified slag particles fall into the fluidized bed below for further cooling and solidification, and then are discharged from the slag particle outlet pipe, completing the granulation of the manganese slag melt.

[0020] The beneficial effects of this invention include: by introducing the molten manganese slag to be granulated into a rotating drum, the molten manganese slag enters the injection pipe under the action of centrifugal force. While the drum rotates, the intermittent injection control component rotates synchronously. The roller on the bottom of the lower guide rod of the intermittent injection control component rolls on the annular guide rail. When the roller rolls onto the protrusion, the lower guide rod lifts the sealing plate, and the injection pipe is in a conductive state. The molten manganese slag in the injection pipe flows towards the granulation chamber. After the roller leaves the position of the protrusion, the spring presses down the sealing plate to cut off the molten manganese slag in the injection pipe. The roller rolls to the next protrusion and opens the injection pipe again. The repeated rapid opening and closing causes the molten manganese slag filaments in the injection pipe to be mechanically broken and intermittently injected into the granulation chamber for granulation. This can effectively control the diameter of the slag particles obtained by granulation, and the slag particles are relatively uniform, effectively enhancing the granulation effect of the molten slag. Attached Figure Description

[0021] Figure 1 This is an overall schematic diagram of the manganese slag melt granulation device in an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the interior of the granulation chamber after it has been cut open in an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the connection of the scraper rod in an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the installation of the rotating drum and intermittent injection control components in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the intermittent injection control component in an embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of the annular guide rail in an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of the rotating drum in an embodiment of the present invention.

[0028] Figure reference numerals: 1 Granulation chamber; 101 Hot air outlet; 102 Jacketed sleeve; 103 Cooling water inlet; 104 Cooling water outlet; 2 Granulator; 201 Rotary drum; 2011 Inner liner; 2012 Heating coil; 2013 Insulation layer; 2014 Protective shell; 2015 Conductive ring; 202 Central shaft; 203 Support cylinder; 204 Drive component; 205 Injection pipe; 206 Intermittent injection control component; 2061 Fixing seat; 2062 Sealing plate; 20621 Sealing area; 20622 Passage area; 2 063 Circular guide rail; 2064 Receiving groove; 2065 Gate; 2066 Slide rail; 2067 Upper guide rod; 2068 Lower guide rod; 2069 Through hole; 20610 Spring; 20611 Protrusion block; 20612 Roller; 207 Nozzle; 208 Guide cone; 209 Chute; 3 Slag guide pipe; 4 Slag particle outlet pipe; 5 Cold air inlet pipe; 6 Central gear; 7 Planetary gear; 8 Planetary carrier; 9 Large gear ring; 10 Scraper; 11 Support ring; 12 Fluidized bed; 13 Fixed rod; 14 Hot gas collection hood. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0030] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified. Example 1

[0033] Please see Figures 1 to 6The manganese slag granulation device disclosed in this invention includes a granulation chamber 1 and a granulator 2 disposed inside the granulation chamber 1. The granulation chamber 1 has a double-cone tank structure. A jacketed sleeve 102 is provided in the middle of the tank body of the granulation chamber 1. A cooling water inlet 103 and a cooling water outlet 104 are connected to the jacketed sleeve 102. The cooling water inlet 103 is used to communicate with external cooling water. The cooling water outlet 104 is used to transport the hot water generated after heat exchange to external equipment that uses hot water to recover the waste heat resources of the manganese slag molten liquid. A hot air outlet 101 is opened at the top of the granulation chamber 1. A hot air collection hood 14 is provided above the hot air outlet 101. The hot air collection hood 14 is used to collect the hot air generated during the granulation process of the manganese slag molten liquid and then transport it to external heat-using equipment to recover manganese. The waste heat resource of the molten slag is utilized by a slag guide pipe 3 extending from the top of the granulation bin 1 to the top of the granulator 2. The slag guide pipe 3 is used to guide the molten manganese slag to be granulated into the granulator 2 for granulation. At the bottom of the granulation bin 1, there is a slag particle outlet pipe 4 and a cold air inlet pipe 5. The cold air inlet pipe 5 is connected to an external cold air fan to introduce cooling medium (cold air) into the granulation bin 1. The slag particle outlet pipe 4 is used to discharge the granulated and cooled slag particles from the granulation bin 1. The granulator 2 includes a rotating cylinder 201, a central shaft 202, a support cylinder 203, and a drive component 204. The support cylinder 203 is vertically fixed on the center line inside the granulation bin 1, and its bottom end is fixedly connected to the inner bottom surface of the granulation bin 1. The central shaft 202 is rotatably located in the center of the support cylinder 203. The support cylinder 203 has multiple bearings (not shown) inside for axial and radial support of the central shaft 202, preventing vertical or horizontal displacement of the central shaft 202. The top end of the central shaft 202 extends outside the support cylinder 203 and is fixedly connected to the bottom end of the rotating cylinder 201. The bottom end of the central shaft 202 extends outside the granulation chamber 1 and is connected to the output end of the drive component 204. Specifically, the drive component 204 is a motor, and the motor output is reduced in speed by a reduction gearbox before being output to the central shaft 202, driving the rotating cylinder 201 to rotate. Several injection pipes 205 are horizontally arranged around the bottom side wall of the rotating cylinder 201. All injection pipes 205 are connected to the interior of the rotating cylinder 201, and each injection pipe 205 is equipped with an intermittent injection control component 206. The intermittent injection control component 206 includes a fixed base 2061, a sealing plate 2062, and an annular guide rail 2063. The fixed base 2061 is fixed to the outer wall of the rotating drum 201. The injection pipe 205 passes horizontally through the fixed base 2061. A receiving groove 2064 is provided on the fixed base 2061, and a gate 2065 is provided on the pipe body of the injection pipe 205 located in the receiving groove 2064. The sealing plate 2062 is slidably disposed in a slide 2066 formed by the two side walls of the receiving groove 2064 and the gate 2065. The sealing plate 2062 has a sealing area 20621 and a passage area 20622. The passage area 20622 is a hole with the same diameter as the inner diameter of the cavity of the injection pipe 205. When the sealing plate 2062 slides up and down on the slide 2066...After the area 20622 is aligned with the cavity of the injection pipe 205, the injection pipe 205 is in a conductive state. After the blocking area 20621 is aligned with the cavity of the injection pipe 205, it is in a blocked state. An upper guide rod 2067 and a lower guide rod 2068 are respectively provided at the upper and lower ends of the blocking plate 2062. Through holes 2069 are provided at both ends of the fixing base 2061 for the upper guide rod 2067 and the lower guide rod 2068 to pass through. The through holes 2069 are connected to the receiving groove 2064. Inside, a spring 20610 is fitted onto the upper guide rod 2067. One end of the spring 20610 abuts against the top surface of the receiving groove 2064, and the other end abuts against the upper end of the sealing piece 2062. When the sealing piece 2062 moves upward, the spring 20610 is compressed. The annular guide rail 2063 is fixed to the top of the support cylinder 203. The top of the central shaft 202 passes through the annular guide rail 2063. Several rounded protrusions 20611 are provided at intervals. A roller 20612 is rotatably mounted at the bottom end of the lower guide rod 2068. The roller 20612 corresponds to the surface of the annular guide rail 2063, meaning the roller 20612 rolls along the surface of the annular guide rail 2063. A fluidized bed 12 is provided at the bottom of the granulation bin 1. The cold air inlet pipe 5 is connected to the air inlet of the fluidized bed 12, and the slag particle outlet pipe 4 is connected to the discharge outlet of the fluidized bed 12.

[0034] In this embodiment, during the granulation process, the molten manganese slag to be granulated enters the granulator 2 above the slag guide pipe 3 and falls into the rotating drum 201. Under the action of centrifugal force, the molten manganese slag enters the injection pipe 205. Simultaneously with the rotation of the drum 201, the intermittent injection control component 206 rotates synchronously. The roller 20612 at the bottom of the lower guide rod 2068 rolls on the annular guide rail 2063. When the roller 20612 rolls onto the protrusion 20611, the lower guide rod 2068 pushes up the sealing plate 2062, thus opening the passage area 2062 of the sealing plate 2062. Aligning with the cavity of the injection pipe 205, the molten manganese slag inside the injection pipe 205 flows towards the granulation chamber 1. After the roller 20612 leaves the position of the protrusion 20611, the spring 20610 presses down the sealing plate 2062, causing the sealing area 20621 of the sealing plate 2062 to cut off the molten manganese slag inside the injection pipe 205 for sealing. The roller 20612 rolls to the next protrusion 20611 and opens the injection pipe 205 again. The rapid opening and closing causes the molten manganese slag inside the injection pipe 205 to be mechanically broken and intermittently sprayed into the granulation chamber 1 for granulation, even for molten manganese slag with high viscosity. Without requiring high speeds or large turntables, the intermittent injection control component 206 can cut molten manganese slag filaments into smaller and more uniform slag particles. It cleverly utilizes the rotational power of the rotating drum 201, allowing for intermittent switching control of the injection pipe 205 without the need for a new power source. During switching, the molten manganese slag within the injection pipe 205 undergoes mechanical crushing. Furthermore, the intermittent switching control of the injection pipe 205 is achieved through a purely mechanical structure, eliminating the need for electronic components. This results in a longer service life and more stable operation within the high-temperature granulation chamber 1. Simultaneously, by controlling the rotational speed of the rotating drum 201 (the manganese slag filaments during injection...), the system can also cut the molten manganese slag filaments into smaller and more uniform slag particles. The frequency of cutting off the nozzle 205 can also effectively control the particle size of the granulated slag. The generated slag particles are then rapidly cooled and shaped by convective heat exchange with the cold air blown from bottom to top. Some slag particles fly onto the side wall of the granulation chamber 1. Since the cooler water is circulating in the jacket 102, the inner wall of the granulation chamber 1 and the slag particles undergo radiative heat exchange, which further cools the slag particles and reduces the adhesion of slag particles to the inner wall of the granulation chamber 1. After cooling, the slag particles fall into the fluidized bed 12 below and are further cooled into slag particles below 50°C. The slag particles obtained by granulation have a smaller and more uniform diameter, which effectively enhances the granulation effect of the molten slag. Example 2

[0035] Please see Figure 5 To facilitate adjustment and change of the particle size and shape of the slag particles, this embodiment adds a nozzle 207 based on embodiment 1. The nozzle 207 is detachably provided at the end of the injection pipe 205 away from the rotating drum 201, that is, the nozzle 207 is provided at the outlet end of the injection pipe 205. The nozzle 207 is preferably installed at the outlet end of the injection pipe 205 by means of threaded connection. During the granulation process, the diameter of the slag filaments ejected from the nozzle 207 is basically consistent with the inner diameter and shape of the nozzle 207. Example 3

[0036] Please see Figure 7 To prevent the molten manganese slag from suddenly pre-cooling and solidifying upon entering the rotating drum 201, which could cause blockage of the injection pipe 205 and nozzle 207 and affect granulation efficiency, this embodiment, based on embodiment 2 above, includes a guide cone 208 on the inner bottom surface of the rotating drum 201. Several chutes 209 are arranged around the conical surface of the guide cone 208. One end of each chute 209 near the side wall of the rotating drum 201 is connected to one end of the injection pipe 205. The chutes 209 gradually decrease in size from the middle conical surface of the guide cone 208 to the bottom. The guide cone 208 allows the molten manganese slag to diffuse evenly to the surrounding area. The chutes 209 are formed by raised ribs on both sides. When the rotating drum 201 rotates, some of the molten manganese slag is stirred to form a vortex, promoting mixing and preventing localized cooling and solidification. Some of the molten manganese slag is thrown into the injection pipe 205 along the chutes 209. Furthermore, the inner wall of the rotating drum 201 is formed by an inner liner 20... 11. The heating coil 2012, insulation layer 2013, and protective shell 2014 are used. The heating coil 2012 is a resistance heating coil, the inner liner 2011 is made of graphite material, and the insulation layer 2013 is made of rare earth ceramic heat insulation material. The heating coil 2012 is sleeved on the inner liner 2011. A conductive ring 2015 is provided on the top end face of the support cylinder 203. The diameter of the conductive ring 2015 is smaller than the diameter of the annular guide rail 2063. The terminal on the heating coil 2012 is electrically connected to the conductive ring 2015. The conductive ring 2015 is electrically connected to an external power source, so that the heating coil 2012 can be energized even when rotating. When the manganese slag melt rotates in the rotating drum 201, the heat generated by the heating coil 2012 radiates to the manganese slag melt for heating and insulation, ensuring the fluidity of the manganese slag melt in the rotating drum, preventing the manganese slag melt from solidifying and causing blockage, reducing the viscosity of the manganese slag melt, and improving the granulation effect. Of course, the heating coil 2012 can also be an induction coil. By passing a medium-frequency current through the conductive ring 2015, the medium-frequency current generates a high density of magnetic lines of force in the induction coil and cuts the manganese slag melt contained in the induction coil, causing the manganese slag melt to generate a large eddy current for heating, thereby preventing the manganese slag melt from solidifying. Example 4

[0037] Please see Figure 3To further prevent slag particles from splashing and adhering to the inner wall of the granulation chamber 1, thus affecting the radiative heat exchange effect, this embodiment, based on the above embodiment 3, adds a scraper 10 to promptly scrape off the molten slag adhering to the inner wall of the granulation chamber 1. Moreover, the power required for scraping is borrowed from the rotational power of the granulator 2, eliminating the need for a new power source and saving energy consumption. In this embodiment, a central gear 6 is fitted onto the protective shell 2014, and several planetary gears 7 are meshed around the central gear 6. All planetary gears 7 are rotatably mounted on a planetary carrier 8. The planetary carrier 8 is fixedly connected to the inner wall of the granulation chamber 1 via a fixing rod 13. A large gear ring 9 is meshed around the planetary gears 7, and a scraper 10 is connected to the large gear ring 9. 0 abuts against the inner wall of granulation chamber 1; the scraper 10 has a "C" shaped structure, and the bottom of the support cylinder 203 is rotatably fitted with a support ring 11. The lower end of the scraper 10 is connected to the support ring 11, the middle section of the "C" shaped structure of the scraper 10 abuts against the inner wall of granulation chamber 1, and the two ends are respectively connected to the large gear ring 9 and the support ring 11. When the rotating cylinder 201 (protective shell 2014) rotates, the central gear 6 rotates synchronously. The central gear 6 drives the planetary gear 7, and the planetary gear 7 drives the large gear ring 9 to reverse, thereby enabling the scraper 10 to scrape off the slag adhering to the inner wall of granulation chamber 1 in time. Since the scraper 10 needs low speed and high torque when scraping the inner wall of granulation chamber 1, the planetary gear transmission method of this embodiment can achieve this well. Example 5

[0038] Please see Figures 1 to 7 The granulation method for molten manganese slag disclosed in this embodiment utilizes the granulation device for molten manganese slag in the above embodiment, and includes the following steps:

[0039] S1. Start the drive unit 204. The drive unit 204 drives the rotating drum 201 to rotate through the central shaft 202. At the same time, the external power supply is connected to the heating coil 2012 through the conductive ring 2015. The external cooling air enters the fluidized bed 12 through the cold air inlet pipe 5 and blows upward. The external cooling water enters the jacket sleeve 102 through the cooling water inlet 103 and flows out of the jacket sleeve 102 through the cooling water outlet 104 for circulation. S2. The manganese slag melt enters the rotating drum 201 through the slag guide pipe 3, is poured onto the top of the guide cone 208, and flows evenly into the chute 209 along the guide cone 208. Under the action of centrifugal force, part of the manganese slag melt is thrown onto the inner wall of the rotating drum 201, and part enters the injection pipe 205 along the chute 209 to form liquid filaments. The liquid filament is thrown outward (in the form of a liquid column when the diameter of the jet pipe 205 is large and the inflow rate is large). During the flight process, the liquid filament gradually breaks into droplets. The droplets exchange heat with the cooling air blown from the fluidized bed 12 in the granulation chamber 1 through convection and with the side wall of the jacket sleeve 102 through radiation. The jacket sleeve 102 can reduce the adhesion of the droplets to the inner wall of the granulation chamber 1 (the side wall shared by the jacket sleeve 102 and the granulation chamber 1). The droplets initially solidify into slag particles of a certain size. S3, some of the manganese slag melt is thrown onto the inner wall of the rotating drum 201. The heat generated by the energized heating coil 2012 heats and keeps the manganese slag melt warm, ensuring the fluidity of the manganese slag melt in the rotating drum 201 and preventing the manganese slag melt from solidifying and causing blockage. Since the chute 209 is made of convexities on both sides... The ribs are designed so that when the rotating drum 201 rotates, the raised ribs can stir part of the manganese slag melt to form a vortex, promoting more uniform mixing of the manganese slag melt. This facilitates heat exchange between the manganese slag melt and the jacket sleeve 102, further preventing local cooling and solidification of the manganese slag melt. S4. During the process of the manganese slag melt being thrown out of the injection pipe 205, the intermittent injection control component 206 continuously opens and closes the injection pipe 205 at intervals, causing the liquid filament to be cut and split into droplets under mechanical crushing disturbance. When the intermittent injection control component 206 is working, it rotates together with the rotating drum 201. When the roller 20612 on the lower guide rod 2068 on the intermittent injection control component 206 rolls and rotates to the protrusion 20611 on the annular guide rail 2063, the sealing plate 2062 is pushed up, causing the sealing plate 2062 to be lifted. The passage zone 20622 on 062 is aligned with the cavity of the injection pipe 205, allowing the molten manganese slag to be thrown out through the injection pipe 205. After the lower guide rod 2068 leaves the protrusion 20611, the sealing plate 2062 descends under the elastic force of the spring 20610 on the upper guide rod 2067, causing the sealing zone 20621 to block the cavity of the injection pipe 205. This achieves the mechanical crushing and splitting of the liquid filament by the interval switch of the injection pipe 205, resulting in smaller and more uniform slag particles. S5: When the molten manganese slag is thrown onto the inner wall of the granulation chamber 1, the central gear 6 on the protective shell 2014 drives the planetary gear 7 to rotate, and the large gear ring 9 decelerates and reverses to drive the scraper 10 to rotate and scrape off the molten slag adhering to the inner wall of the granulation chamber 1, thus avoiding affecting the cooling of the slag particles.S6. Under the influence of gravity, the initially solidified slag particles fall onto the fluidized bed 12 below for further cooling and solidification, and then are discharged from the slag particle outlet pipe 4, completing the granulation of the manganese slag melt.

[0040] The above description provides a further detailed explanation of the present invention in conjunction with specific / preferred embodiments, and it should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the scope of protection of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. A manganese slag granulation device, characterized in that: The device includes a granulation bin and a granulator disposed inside the granulation bin. The top of the granulation bin has a hot air outlet, and the top of the granulation bin has a slag guide pipe extending to the top of the granulator. The bottom of the granulation bin has a slag outlet pipe and a cold air inlet pipe. The granulator includes a rotating drum, a central shaft, a support cylinder, and a drive unit. The support cylinder is vertically fixed to the center line of the granulation bin. The central shaft is rotatably disposed inside the support cylinder, with its top extending outside the support cylinder and fixedly connected to the bottom end of the rotating drum. The bottom end of the central shaft extends outside the granulation bin and is connected to the output end of the drive unit. Several injection pipes are arranged around the bottom sidewall of the rotating drum, and each injection pipe is equipped with an intermittent injection control component. The injection control component includes a fixed base, a sealing plate, and an annular guide rail. The fixed base is fixed to the outer wall of the rotating cylinder. The injection pipe passes horizontally through the fixed base. The fixed base has a receiving groove. The injection pipe has a gate on its body located in the receiving groove. The sealing plate is slidably disposed in a slide formed by the two side walls of the receiving groove and the gate. The sealing plate has a blocking area and a passing area. The two ends of the sealing plate are respectively provided with an upper guide rod and a lower guide rod. The two ends of the fixed base are respectively provided with through holes for the upper guide rod and the lower guide rod to pass through. A spring is sleeved on the upper guide rod. The annular guide rail is fixed to the top of the support cylinder. The rail surface of the annular guide rail is provided with several arc-shaped protrusions at intervals. The bottom end of the lower guide rod is rotatably provided with a roller, which corresponds to the rail surface of the annular guide rail.

2. The manganese slag granulation device as described in claim 1, characterized in that: The nozzle is detachably provided at the end of the injection pipe away from the rotating drum.

3. The manganese slag granulation device as described in claim 2, characterized in that: The inner bottom surface of the rotating drum is provided with a guide cone, and a number of chutes are arranged around the cone surface of the guide cone. One end of the chutes near the side wall of the rotating drum is connected to one end of the injection pipe. The size of the chutes gradually decreases from the middle cone surface of the guide cone to the bottom of the cone.

4. The manganese slag granulation device as described in claim 3, characterized in that: The rotating cylinder is composed of an inner liner, a heating coil, an insulation layer, and a protective shell from the inside out. The heating coil is sleeved on the inner liner, and a conductive ring is provided on the top end face of the support cylinder. The terminal on the heating coil is electrically connected to the conductive ring.

5. The manganese slag granulation device as described in claim 4, characterized in that: A central gear is fitted onto the protective housing, and several planetary gears are meshed around the central gear. Each of the planetary gears is rotatably mounted on a planetary carrier. The planetary carrier is fixedly connected to the inner wall of the granulation chamber via a fixing rod. A large gear ring is meshed around the planetary gears, and a scraper is connected to the large gear ring. The scraper abuts against the inner wall of the granulation chamber.

6. The manganese slag granulation device as described in claim 5, characterized in that: The scraper has a "C" shaped structure, and a support ring is fitted at the bottom of the support cylinder. The lower end of the scraper is connected to the support ring.

7. The manganese slag granulation device as described in claim 6, characterized in that: The granulation chamber has a double-cone tank structure, and the middle tank body of the granulation chamber is provided with a jacket sleeve, which is connected to a cooling water inlet and a cooling water outlet.

8. The manganese slag granulation device as described in claim 7, characterized in that: A fluidized bed is provided at the bottom of the granulation chamber. The cold air inlet pipe is connected to the air inlet of the fluidized bed, and the slag particle outlet pipe is connected to the discharge outlet of the fluidized bed.

9. A method for granulating molten manganese slag, characterized in that: Granulation using the manganese slag melt granulation device according to claim 8 includes the following steps: S1. Start the drive unit. The drive unit drives the rotating drum to rotate through the central shaft. At the same time, the external power supply is connected to the heating coil through the conductive ring. The external cooling air enters the fluidized bed from the cold air inlet pipe and blows upward. The external cooling water enters the jacket from the cooling water inlet and flows out of the jacket from the cooling water outlet for circulation. S2. The molten manganese slag enters the rotating drum through the slag guide pipe, is poured onto the top of the guide cone, and flows evenly into the chute along the guide cone. Under the action of centrifugal force, part of the molten manganese slag is thrown onto the inner wall of the rotating drum, and part enters the injection pipe to form liquid filaments that are thrown outward. During the flight of the liquid filaments, they gradually break into droplets. The droplets undergo convective heat exchange with the air blown up from the fluidized bed in the granulation chamber and radiative heat exchange with the side wall of the jacket, and initially solidify into slag particles of a certain size. S3. When the molten manganese slag is thrown onto the inner wall of the rotating drum, the heat generated by the energized heating coil is radiated to the molten manganese slag for heating and heat preservation, ensuring the fluidity of the molten manganese slag in the rotating drum and preventing the molten manganese slag from solidifying and causing blockage. S4. During the process of the manganese slag molten liquid being thrown out of the injection pipe, the intermittent injection control component continuously opens and closes the injection pipe at intervals, mechanically breaking the liquid filaments in the injection pipe into droplets. When the intermittent injection control component is working, it rotates together with the rotating drum. When the lower guide rod on the intermittent injection control component rotates to the protrusion on the annular guide rail, the sealing plate is pushed up so that the passage area on the sealing plate is aligned with the cavity of the injection pipe, and the manganese slag molten liquid can be thrown out through the injection pipe. After the lower guide rod leaves the protrusion, the sealing plate descends under the action of the spring force on the upper guide rod, so that the sealing area blocks the cavity of the injection pipe, realizing the intermittent opening and closing of the injection pipe. S5. When the molten manganese slag is thrown onto the inner wall of the granulation chamber, the central gear on the protective shell drives the planetary gear to rotate. After the planetary gear is decelerated, it drives the large gear ring to reverse. The large gear ring drives the scraper to rotate and scrape off the molten slag stuck to the inner wall of the granulation chamber, so as to avoid affecting the cooling of the slag particles. S6. Under the influence of gravity, the initially solidified slag particles fall into the fluidized bed below for further cooling and solidification, and then are discharged from the slag particle outlet pipe, completing the granulation of the manganese slag melt.

Images